/*
* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
#ifndef SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
#define SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP
#include "jni.h"
#include "jfr/utilities/jfrAllocation.hpp"
class JfrChunkWriter;
class JfrPostBox;
//
// Represents the location on disk where internal files, "chunks", are stored.
//
// A "chunk" is a self-contained file artifact storing events and metadata that
// has been moved out of process memory.
//
// Chunk files are associated with recordings and are managed at a higher level in Java.
// Java continously keeps the VM informed about new chunk locations via set_chunk_path().
//
// A JfrChunkWriter will open the next chunk file which it maintains as the current chunk.
// There is a rotation scheme in place for creating new chunks at certain intervals.
//
class JfrRepository : public JfrCHeapObj {
friend class JfrRecorder;
friend class JfrRecorderService;
private:
char* _path;
JfrPostBox& _post_box;
JfrRepository(JfrPostBox& post_box);
~JfrRepository();
bool set_path(const char* path);
void set_chunk_path(const char* path);
bool open_chunk(bool vm_error = false);
size_t close_chunk(jlong metadata_offset);
void on_vm_error();
static void notify_on_new_chunk_path();
static JfrChunkWriter& chunkwriter();
static JfrRepository& instance();
static JfrRepository* create(JfrPostBox& post_box);
bool initialize();
static void destroy();
public:
static void set_path(jstring location, JavaThread* jt);
static void set_chunk_path(jstring path, JavaThread* jt);
};
#endif // SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP